Microsoft fixes game, app crashes caused by recent Windows update

Microsoft has fixed a known issue that caused games and Windows 11 apps using AC-3 (Dolby Digital) audio decoding to crash after installing the September 2026 preview update (KB5124010).

While KB5124010 is an optional update that requires clicking a "Download and install" link (reducing the number of potentially affected Windows users), it installs automatically on devices where the "Get the latest updates as soon as they're available" option is toggled on.

"In some cases the application can fail to launch, or close without warning. In other cases the application will work normally until certain features are used, such as playing music," Microsoft said when it acknowledged this issue two weeks ago. "Affected applications may vary and can include games, media players, and certain productivity applications."